Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Renker, M; Ramachandra, A; Schoepf, UJ; Raupach, R; Apfaltrer, P; Rowe, GW; Vogt, S; Flohr, TG; Kerl, JM; Bauer, RW; Fink, C; Henzler, T.
Iterative image reconstruction techniques: Applications for cardiac CT.
J Cardiovasc Comput Tomogr. 2011; 5(4):225-230
Doi: 10.1016/j.jcct.2011.05.002
Web of Science
PubMed
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- Co-Autor*innen der Med Uni Graz
- Apfaltrer Paul
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- Abstract:
- Traditional limitations of cardiac CT are related to image noise, blooming artifacts from calcifications and stents, and radiation exposure. We evaluated whether these limitations can be ameliorated by the use of iterative reconstruction in image space (IRIS) instead of traditional filtered back projection (FBP) image reconstruction techniques. We compared image reconstruction with the use of IRIS with traditional FBP for their effect on image quality, noise, volume of heavy coronary artery calcifications, and stents as a measure of "blooming" artifacts, and radiation dose at cardiac CT. The radiation dose comparison was performed as a matched pair analysis, whereas all other comparisons were performed within the same group of patients. The subjective image quality of IRIS reconstructions was rated higher than FBP reconstructions. Image noise was lower with IRIS than with FBP. The volume of stents and heavy coronary artery calcifications measured lower in IRIS reconstructed series compared with FBP. Similar levels of image noise were achieved with 80/100 kVp of tube voltage with IRIS compared with 120 kVp and FBP, resulting in a 62% reduction in effective dose. Our preliminary experiences suggest that IRIS incrementally improves the CT evaluation of coronary arteries, especially in challenging scenarios. Substantial radiation reduction seems feasible without associated increases in image noise. Copyright © 2011 Society of Cardiovascular Computed Tomography. Published by Elsevier Inc. All rights reserved.
- Find related publications in this database (using NLM MeSH Indexing)
- Algorithms -
- Artifacts -
- Calcinosis - diagnostic imaging
- Coronary Angiography - methods
- Coronary Stenosis - diagnostic imaging
- Female -
- Humans -
- Male -
- Matched-Pair Analysis -
- Middle Aged -
- Predictive Value of Tests -
- Radiation Dosage -
- Radiographic Image Interpretation, Computer-Assisted - methods
- Reproducibility of Results -
- Severity of Illness Index -
- Stents -
- Tomography, X-Ray Computed -
- Find related publications in this database (Keywords)
- Iterative reconstruction
- Filtered back-projection
- Coronary CT angiography
- Image noise
- Radiation dose
- Cardiac CT